Industrial Applicability of Antireflection-Coating-Free Black Silicon on PERC Solar Cells and Modules

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific


Research units

  • Naps Solar Systems Inc.
  • Beneq Oy
  • Endeas Oy
  • SolarWorld Industries GmbH
  • SolarWorld Innovations GmbH


Black silicon (b-Si) is of particular interest within the photovoltaic community due to its ability to texture diamond wire-sawn multicrystalline silicon wafers. In this work, we apply a deep dry-etched black silicon nanotexture, which possesses less than 1 % solar-weighted reflectance with no antireflection coating (ARC), to industrial Passivated Emitter and Rear Cells (PERC). Additionally, the cells are processed further into small solar modules, which are characterized by their electrical and optical performance. The fragile nanostructures remain intact during industrial cell and module fabrication, maintaining the excellent optical properties until the final product. We show that b-Si modules with a typical cover glass retain their performance until incident angles larger than 60°, whereas the heavily increased reflectance of acidic-textured modules decreases their efficiency already after a 30° tilt. Furthermore, at an incidence angle of 70°, the efficiency of b-Si modules has reduced only 7 %, while that of the acidic-textured equivalents has decreased more than 25 %. Hence, the excellent optical properties of ARC-free b-Si are maintained also at module level. The results demonstrate that deep dry-etched b-Si nanostructures are fully applicable to current industrial PERC production facilities.


Original languageEnglish
Title of host publication35th European Photovoltaic Solar Energy Conference and Exhibition
Publication statusPublished - 2018
MoE publication typeB3 Non-refereed article in conference proceedings
EventEuropean Photovoltaic Solar Energy Conference and Exhibition - SQUARE - Brussels Meeting Centre, Brussels, Belgium
Duration: 24 Sep 201828 Sep 2018
Conference number: 35

Publication series

NameEU PVSEC Proceedings
ISSN (Electronic)2196-100X


ConferenceEuropean Photovoltaic Solar Energy Conference and Exhibition
Abbreviated titleEU PVSEC
Internet address

    Research areas

  • Incidence Angle, Black Silicon, Multicrystalline Silicon, Passivated Emitter, Rear Cell (PERC)

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